1. Arm fracture, the arm after the operation cannot unbend, what is the principle? + arm fracture, the arm after the operation.

手臂骨折,手术后胳臂不能伸直,原理是什么?+手臂骨折,手术后胳臂。
2. The main products of the company include ball joint, tie rod end, rack end, side rod assy, track control arm, stabilizer link, Inner arm shaft kit, pitman arm & bell crank, idler arm etc.

本公司主要产品有:悬挂球头,拉杆球头,横拉杆,拉杆总成,控制臂,平衡杆,连接杆等。
3. a lift arm actuatable by activation of the motor, said lift arm engaging a flush arm within a toilet tank of the toilet so as to cause the flush arm to flush the toilet.

升降臂,可通过开启马达而启动,该升降臂与马桶水箱中的冲水臂接合,以使所述冲水臂引发马桶冲水。
4. Leer arm A-B may be shorter than normal in arthritic hip. Centralization of head shortens leer arm B-X, and lateral reattachment of trochanter lengthens leer arm A-B.

在炎性病变的髋关节A-B可能比正常情况短,股骨头中心化可缩短B-X,而将大粗隆外移重固定可加长A-B。
5. Optimization about the structure of crane jib arm mainly focuses on gantry crane and single-arm crane presently, moreover toward the jib arm structure, the study is still underway.

因此,对拔杆式起重机臂架结构的拓扑优化进行研究和创新有着很大的必要性以及相当重要的工程实际意义。